The paper suggests replacing the shareholder/stakeholder distinction with a “Dual-Investor” model of business: stockowners provide the specific capital for business ventures, while society provides the “opportunity capital.” Thus society is an investor in every business venture. Dual-Investor theory provides a response (based purely on the ethics of investment) to Milton Friedman’s arguments that executives should maximize profit by any legal means, avoids recent criticisms by Kenneth Goodpaster and Thomas McMahon, and suggests that the dichotomy between private and public ownership overlooks several important alternatives. Some consequences of the theory are detailed and a sketch of a theory of property, based on Dual-Investor theory, is appended